AK8826VN Datasheet, PDF (97/157 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

■ Adjustable Timing Function Between SYNC signal and HDY Signal, Between HDPB Signal and HDPr signal
[AK8826VN]
SYNC Timing and Y signal output relation is adjustable in the AK8826. Setting of adjustable amount is made by
HDYDELAY[2:0]-bit of HDYPBPR Delay Control Register [SubAddress 0x02].
Adjustable range between SYNC signal and Y signal is +/- 3clocks.
Adjustable unit in 525i / p mode is based on 27MHz clock and in 1080i/720p modes it is based on 74.25MHz clock.
By this bit manipulation, Pb/Pr are shifted similarly as in the case of Y.
Pb / Pr signals with Y signal relation are adjusted by PBPRDELAY[2:0]-bit of HDYPBPR Delay COntrol Register
[SubAddress0x02].
Adjustable range is +/- 3clocks. Adjustable unit in 525i / p modes is based on 27MHz clock, and in 080i/720p modes, it is based
on 74.25MHz.
244T @ 27MHz
Y
Y
(default)
247T @ 27MHz
241T @ 27MHz
Y
SYNC signal and Y signal relation
Pb/Pr
27MHz-clock
3clk 3clk
Y signal and PbPr signal relation
Fig. 142 525i/p, 625i/p mode
Y
(default)
188T @ 74.25MHz
Y
Y
185T @ 74.25MHz
191T @ 74.25MHz
SYNC signal and Y signal relation
Pb/Pr
74.25MHz-clock
3clk 3clk
Y signal and PbPr signal relation
Fig. 143 1080i mode
MS0972-E-01
97
2008/12